/**
* Returns the state indicating if there is a space to draw tick label.
*
* @param previousPosition the previously drawn tick label position.
* @param tickLabelPosition the tick label position.
* @param tickLabel the tick label text
* @return true if there is a space to draw tick label
*/
private boolean hasSpaceToDraw(int previousPosition, int tickLabelPosition, String tickLabel) {
Point p = Util.getExtentInGC(axis.getTick().getFont(), tickLabel);
int interval = tickLabelPosition - previousPosition;
int textLength = axis.isHorizontalAxis() ? p.x : p.y;
return interval > textLength;
}
/*
* @see PaintListener#paintControl(PaintEvent)
*/
public void paintControl(PaintEvent e) {
if (!axis.getTick().isVisible()) {
return;
}
e.gc.setBackground(chart.getBackground());
e.gc.setForeground(getForeground());
if (axis.isHorizontalAxis()) {
drawXTick(e.gc);
} else {
drawYTick(e.gc);
}
}
/** Updates the tick labels layout. */
protected void updateLayoutData() {
widthHint = SWT.DEFAULT;
heightHint = SWT.DEFAULT;
if (!axis.getTick().isVisible()) {
widthHint = 0;
heightHint = 0;
} else {
if (axis.isHorizontalAxis()) {
double angle = axis.getTick().getTickLabelAngle();
heightHint =
Axis.MARGIN
+ (int)
(tickLabelMaxLength * Math.sin(Math.toRadians(angle))
+ Util.getExtentInGC(getFont(), "dummy").y
* Math.cos(Math.toRadians(angle)));
} else {
widthHint = tickLabelMaxLength + Axis.MARGIN;
}
}
}